MPEP § 2273 — Appeal in Ex Parte Reexamination (Annotated Rules)

§2273 Appeal in Ex Parte Reexamination

USPTO MPEP version: BlueIron's Update: 2025-12-31

This page consolidates and annotates all enforceable requirements under MPEP § 2273, including statutory authority, regulatory rules, examiner guidance, and practice notes. It is provided as guidance, with links to the ground truth sources. This is information only, it is not legal advice.

Appeal in Ex Parte Reexamination

This section addresses Appeal in Ex Parte Reexamination. Primary authority: 35 U.S.C. 134, 35 U.S.C. 306, and 35 U.S.C. 257). Contains: 3 requirements, 2 prohibitions, 2 permissions, and 12 other statements.

Key Rules

Topic

Notice of Appeal Filing

8 rules
StatutoryRequiredAlways
[mpep-2273-8ce6ffa6b5d05ea3e9e6d359]
Patent Owner Can Appeal Examiner Rejections
Note:
A patent owner can appeal an examiner's rejection by filing a notice of appeal within the required time if dissatisfied with the ex parte reexamination decision.

A patent owner who is dissatisfied with the primary examiner’s decision to reject claims in an ex parte reexamination proceeding may appeal to the Board for review of the examiner’s rejection by filing a notice of appeal within the required time. A third party requester may not appeal, and may not participate in the patent owner’s appeal.

Jump to MPEP SourceNotice of Appeal FilingNotice of AppealAppeals in Reexamination
StatutoryInformativeAlways
[mpep-2273-20228cc80b072904f0d3257d]
Notice of Appeal Need Not Be Signed
Note:
The notice of appeal does not require a signature, but the fee must accompany it.

The notice of appeal need not be signed. See 37 CFR 41.31(b). The fee required by 37 CFR 41.20(b)(1) must accompany the notice of appeal. See 37 CFR 41.31(a)(2) and (a)(3).

Jump to MPEP Source · 37 CFR 41.31(b)Notice of Appeal FilingNotice of AppealAppeals in Reexamination
StatutoryRequiredAlways
[mpep-2273-9764166aa9de63948877800f]
Fee Required for Notice of Appeal
Note:
The fee required by 37 CFR 41.20(b)(1) must accompany the notice of appeal.

The notice of appeal need not be signed. See 37 CFR 41.31(b). The fee required by 37 CFR 41.20(b)(1) must accompany the notice of appeal. See 37 CFR 41.31(a)(2) and (a)(3).

Jump to MPEP Source · 37 CFR 41.31(b)Notice of Appeal FilingNotice of AppealAppeals in Reexamination
StatutoryInformativeAlways
[mpep-2273-cfa38d9072d503eacd9de0c9]
Appeal Notice Must Be Filed Within Last Office Action Response Period
Note:
The appeal notice must be filed within the response period set by the last Office action, which is typically 2 months. If an extension has been granted, it cannot exceed 6 months from the final rejection.

The period for filing the notice of appeal is the period set for response in the last Office action which is normally 2 months. The timely filing of a first response to a final rejection having a shortened statutory period for response is construed as including a request to extend the period for response an additional two months, even if an extension has been previously granted, as long as the period for response does not exceed 6 months from the date of the final rejection. The normal ex parte appeal procedures set forth at 37 CFR 41.31 through 37 CFR 41.54 apply in ex parte reexamination, except as pointed out in this Chapter. A third party requester may not appeal or otherwise participate in the appeal.

Jump to MPEP Source · 37 CFR 41.31Notice of Appeal FilingTypes of Office ActionsResponse to Office Action Requirements (37 CFR 1.111)
StatutoryInformativeAlways
[mpep-2273-6a98a2cfc24862d87536785a]
Normal Ex Parte Appeal Procedures Apply Except as Noted
Note:
The standard ex parte appeal procedures apply in ex parte reexamination, except for specific exceptions outlined in this chapter.

The period for filing the notice of appeal is the period set for response in the last Office action which is normally 2 months. The timely filing of a first response to a final rejection having a shortened statutory period for response is construed as including a request to extend the period for response an additional two months, even if an extension has been previously granted, as long as the period for response does not exceed 6 months from the date of the final rejection. The normal ex parte appeal procedures set forth at 37 CFR 41.31 through 37 CFR 41.54 apply in ex parte reexamination, except as pointed out in this Chapter. A third party requester may not appeal or otherwise participate in the appeal.

Jump to MPEP Source · 37 CFR 41.31Notice of Appeal FilingNotice of AppealAppeals in Reexamination
StatutoryInformativeAlways
[mpep-2273-7b44ab79dc829ea806f6b250]
Notification for Defective Appeal Filing
Note:
Patent owners must be notified if their appeal notice is defective and have time to correct it.

Where a notice of appeal is defective, the patent owner will be so notified. In third party requested reexaminations, Form PTOL-475 will be used to provide the notification. A time period of one month or thirty days, whichever is longer, will be provided for the patent owner to cure the defect(s) in the appeal. In patent owner requested reexaminations (including reexaminations ordered under 35 U.S.C. 257) or Director ordered reexaminations, Form PTO-2311 will be used to provide the notification, and a two-month time period will be provided for the patent owner to cure the defect(s) in the appeal. An explanation of the defect(s) in the notice of appeal must accompany the appropriate form for providing the notification of the defects (PTOL-475 or PTO-2311).

Jump to MPEP SourceNotice of Appeal FilingNotice of AppealAppeals in Reexamination
StatutoryRequiredAlways
[mpep-2273-b8cb9866d5aef0db7a200e64]
Explanation of Defects Required for Appeal Notification
Note:
An explanation of the defects in the notice of appeal must be provided with the appropriate form (PTOL-475 or PTO-2311) for notification.

Where a notice of appeal is defective, the patent owner will be so notified. In third party requested reexaminations, Form PTOL-475 will be used to provide the notification. A time period of one month or thirty days, whichever is longer, will be provided for the patent owner to cure the defect(s) in the appeal. In patent owner requested reexaminations (including reexaminations ordered under 35 U.S.C. 257) or Director ordered reexaminations, Form PTO-2311 will be used to provide the notification, and a two-month time period will be provided for the patent owner to cure the defect(s) in the appeal. An explanation of the defect(s) in the notice of appeal must accompany the appropriate form for providing the notification of the defects (PTOL-475 or PTO-2311).

Jump to MPEP SourceNotice of Appeal FilingNotice of AppealAppeals in Reexamination
StatutoryInformativeAlways
[mpep-2273-b2a61d1893c7a3c24813f0c0]
Notice of Appeal Filing Required
Note:
Patent owners must timely file a notice of appeal and the appropriate fee; failure to do so results in dismissal of the appeal.

If the patent owner does not timely file a notice of appeal and/or does not timely file the appropriate appeal fee, the patent owner will be notified that the appeal is dismissed. Form PTOL-468 may be used to provide the notification. The reexamination prosecution is then terminated, and a Notice of Intent to Issue Ex Parte Reexamination Certificate (NIRC) will subsequently be issued indicating the status of the claims at the time of final rejection (or after the second rejection of the claims, where an appeal was taken from that action without waiting for a final rejection). See MPEP § 2287.

Jump to MPEP SourceNotice of Appeal FilingNotice of AppealAppeals in Reexamination
Topic

Appeals in Reexamination

6 rules
StatutoryPermittedAlways
[mpep-2273-6028d974f18db79dc589300c]
Appeal Only After Final Rejection In Ex Parte Reexamination
Note:
Patent owners can appeal to the Board only after a final rejection of claims in ex parte reexamination filed on or after November 29, 1999.

The patent owner may appeal to the Board only after the final rejection of the claims. This is based on the version of 35 U.S.C. 134 as amended by Public Law 106-113. This version of 35 U.S.C. 134 applies to appeals in reexamination, where the reexamination was filed in the Office on or after November 29, 1999. See Section 13202(d) of Public Law 107-273.

Jump to MPEP SourceAppeals in ReexaminationEstoppel After JudgmentPTAB Jurisdiction
StatutoryInformativeAlways
[mpep-2273-c5403078582e938fd2c6697c]
No Review of Favorable Patentability Decision
Note:
The reexamination statute does not permit review of a patent examiner's decision that favors the patent owner.

The reexamination statute does not provide for review of a patentability decision favoring the patentee. Greenwood v. Seiko Instruments, 8 USPQ2d 1455 (D.D.C. 1988).

Jump to MPEP SourceAppeals in ReexaminationEx Parte ReexaminationSubstantial New Question of Patentability
StatutoryInformativeAlways
[mpep-2273-c1f86a8ca52887e546545810]
Appeal Not Available for Favorable Patentability Decision
Note:
The reexamination statute does not permit review of a patentability decision that favors the patentee.

The reexamination statute does not provide for review of a patentability decision favoring the patentee. Greenwood v. Seiko Instruments, 8 USPQ2d 1455 (D.D.C. 1988).

Jump to MPEP SourceAppeals in ReexaminationEx Parte ReexaminationEx Parte Appeals to PTAB
StatutoryProhibitedAlways
[mpep-2273-335c40752159fd15cbb29901]
Defective Appeal Not to Extend Time
Note:
Patent owner should not be advised to extend time for a defective appeal in reexamination proceedings.

See MPEP § 1204 for a discussion of the requirements for a proper appeal. However, note that in the unusual circumstances where an appeal is defective (e.g., no proof of service is included, it was filed for the wrong proceeding), patent owner should not be advised by the examiner to obtain an extension of time under 37 CFR 1.136(a), because an extension of time under 37 CFR 1.136 cannot be obtained in a reexamination proceeding.

Jump to MPEP Source · 37 CFR 1.136(a)Appeals in ReexaminationEx Parte ReexaminationEx Parte Appeals to PTAB
StatutoryInformativeAlways
[mpep-2273-db646995930576a97986387c]
Patent Owner Must Cure Appeal Defects Within One Month or Thirty Days, Whichever is Longer
Note:
The patent owner must correct any defects in the appeal within one month or thirty days, whichever period is longer.

Where a notice of appeal is defective, the patent owner will be so notified. In third party requested reexaminations, Form PTOL-475 will be used to provide the notification. A time period of one month or thirty days, whichever is longer, will be provided for the patent owner to cure the defect(s) in the appeal. In patent owner requested reexaminations (including reexaminations ordered under 35 U.S.C. 257) or Director ordered reexaminations, Form PTO-2311 will be used to provide the notification, and a two-month time period will be provided for the patent owner to cure the defect(s) in the appeal. An explanation of the defect(s) in the notice of appeal must accompany the appropriate form for providing the notification of the defects (PTOL-475 or PTO-2311).

Jump to MPEP SourceAppeals in ReexaminationEffect of Supplemental ExaminationEx Parte Appeals to PTAB
StatutoryInformativeAlways
[mpep-2273-c968b88af47136bbc2eb006a]
Notification of Defects and Two-Month Cure Period for Patent Owner Requested Reexaminations
Note:
Patent owners in requested reexaminations (including those ordered under 35 U.S.C. 257) will receive notification via Form PTO-2311 of defects in their appeal and have two months to cure these defects.

Where a notice of appeal is defective, the patent owner will be so notified. In third party requested reexaminations, Form PTOL-475 will be used to provide the notification. A time period of one month or thirty days, whichever is longer, will be provided for the patent owner to cure the defect(s) in the appeal. In patent owner requested reexaminations (including reexaminations ordered under 35 U.S.C. 257) or Director ordered reexaminations, Form PTO-2311 will be used to provide the notification, and a two-month time period will be provided for the patent owner to cure the defect(s) in the appeal. An explanation of the defect(s) in the notice of appeal must accompany the appropriate form for providing the notification of the defects (PTOL-475 or PTO-2311).

Jump to MPEP SourceAppeals in ReexaminationReexamination OrderEffect of Supplemental Examination
Topic

Ex Parte Reexamination

4 rules
StatutoryInformativeAlways
[mpep-2273-613e158256f74845927fb18c]
Patent Owner Can Appeal Only After Final Rejection in Ex Parte Reexamination Filing On Or After November 29, 1999
Note:
The patent owner may appeal to the Board only after a final rejection of claims in an ex parte reexamination filed on or after November 29, 1999.

The patent owner may appeal to the Board only after the final rejection of the claims. This is based on the version of 35 U.S.C. 134 as amended by Public Law 106-113. This version of 35 U.S.C. 134 applies to appeals in reexamination, where the reexamination was filed in the Office on or after November 29, 1999. See Section 13202(d) of Public Law 107-273.

Jump to MPEP SourceEx Parte ReexaminationAppeals in ReexaminationEstoppel After Judgment
StatutoryInformativeAlways
[mpep-2273-226d6792acbca7f86eeceb1d]
Patent Owner May Appeal Only After Final Rejection in Ex Parte Reexamination
Note:
The patent owner can appeal to the Board only after a final rejection of claims in an ex parte reexamination filed on or after November 29, 1999.

The patent owner may appeal to the Board only after the final rejection of the claims. This is based on the version of 35 U.S.C. 134 as amended by Public Law 106-113. This version of 35 U.S.C. 134 applies to appeals in reexamination, where the reexamination was filed in the Office on or after November 29, 1999. See Section 13202(d) of Public Law 107-273.

Jump to MPEP SourceEx Parte ReexaminationAppeals in ReexaminationEstoppel After Judgment
StatutoryInformativeAlways
[mpep-2273-25407b86231328922f642b26]
Form PTOL-475 Used for Third Party Reexaminations
Note:
Patent owners will be notified of defects in appeals using Form PTOL-475, with a one-month period to correct the issues.

Where a notice of appeal is defective, the patent owner will be so notified. In third party requested reexaminations, Form PTOL-475 will be used to provide the notification. A time period of one month or thirty days, whichever is longer, will be provided for the patent owner to cure the defect(s) in the appeal. In patent owner requested reexaminations (including reexaminations ordered under 35 U.S.C. 257) or Director ordered reexaminations, Form PTO-2311 will be used to provide the notification, and a two-month time period will be provided for the patent owner to cure the defect(s) in the appeal. An explanation of the defect(s) in the notice of appeal must accompany the appropriate form for providing the notification of the defects (PTOL-475 or PTO-2311).

Jump to MPEP SourceEx Parte ReexaminationNotice of Appeal FilingNotice of Appeal
StatutoryPermittedAlways
[mpep-2273-9201f1fbdb519fb7551c4487]
Form PTOL-468 for Appeal Dismissal Notification
Note:
Patent owner must be notified via Form PTOL-468 if appeal is dismissed due to untimely filing of notice or fee.

If the patent owner does not timely file a notice of appeal and/or does not timely file the appropriate appeal fee, the patent owner will be notified that the appeal is dismissed. Form PTOL-468 may be used to provide the notification. The reexamination prosecution is then terminated, and a Notice of Intent to Issue Ex Parte Reexamination Certificate (NIRC) will subsequently be issued indicating the status of the claims at the time of final rejection (or after the second rejection of the claims, where an appeal was taken from that action without waiting for a final rejection). See MPEP § 2287.

Jump to MPEP SourceEx Parte ReexaminationNotice of Appeal FilingNotice of Intent to Issue Reexamination Certificate (NIRC)
Topic

Appeal to Federal Circuit

1 rules
StatutoryPermittedAlways
[mpep-2273-385d955f7a98f633367bfc85]
Patent Owner Can Appeal and Seek Review After Reexamination Decision
Note:
The patent owner may appeal a decision during reexamination under section 134 and seek court review under sections 141 to 144 if the decision is adverse to the patentability of any claim.

The patent owner involved in a reexamination proceeding under this chapter may appeal under the provisions of section 134, and may seek court review under the provisions of sections 141 to 144, with respect to any decision adverse to the patentability of any original or proposed amended or new claim of the patent.

Jump to MPEP SourceAppeal to Federal CircuitJudicial Review of Board DecisionsAppeals in Reexamination
Topic

Third Party Requester Rights

1 rules
StatutoryProhibitedAlways
[mpep-2273-25aafd36155c302ddcfd809a]
Third Party Requester Cannot Appeal Patent Owner’s Decision
Note:
A third party requester who disagrees with the examiner's rejection in an ex parte reexamination cannot file an appeal or participate in the patent owner's appeal process.

A patent owner who is dissatisfied with the primary examiner’s decision to reject claims in an ex parte reexamination proceeding may appeal to the Board for review of the examiner’s rejection by filing a notice of appeal within the required time. A third party requester may not appeal, and may not participate in the patent owner’s appeal.

Jump to MPEP SourceThird Party Requester RightsAppeals in ReexaminationInter Partes Reexamination Appeal
Topic

Final Office Action

1 rules
StatutoryInformativeAlways
[mpep-2273-8abcc6b9f3481300c713dec5]
First Response Includes Two-Month Extension After Final Rejection
Note:
The timely filing of a first response to a final rejection with a shortened statutory period for response is construed as including an additional two-month extension, up to a maximum of six months from the date of the final rejection.

The period for filing the notice of appeal is the period set for response in the last Office action which is normally 2 months. The timely filing of a first response to a final rejection having a shortened statutory period for response is construed as including a request to extend the period for response an additional two months, even if an extension has been previously granted, as long as the period for response does not exceed 6 months from the date of the final rejection. The normal ex parte appeal procedures set forth at 37 CFR 41.31 through 37 CFR 41.54 apply in ex parte reexamination, except as pointed out in this Chapter. A third party requester may not appeal or otherwise participate in the appeal.

Jump to MPEP Source · 37 CFR 41.31Final Office ActionReply Period and ExtensionsFinal Rejection in Reexamination
Topic

Interviews in Reexamination

1 rules
StatutoryProhibitedAlways
[mpep-2273-9b7648808daae59119c72257]
Third Party Requester Cannot Appeal
Note:
A third party requester is prohibited from participating in the appeal process for ex parte reexamination.

The period for filing the notice of appeal is the period set for response in the last Office action which is normally 2 months. The timely filing of a first response to a final rejection having a shortened statutory period for response is construed as including a request to extend the period for response an additional two months, even if an extension has been previously granted, as long as the period for response does not exceed 6 months from the date of the final rejection. The normal ex parte appeal procedures set forth at 37 CFR 41.31 through 37 CFR 41.54 apply in ex parte reexamination, except as pointed out in this Chapter. A third party requester may not appeal or otherwise participate in the appeal.

Jump to MPEP Source · 37 CFR 41.31Interviews in ReexaminationThird Party Requester RightsAppeals in Reexamination
Topic

Notice of Intent to Issue Reexamination Certificate (NIRC)

1 rules
StatutoryInformativeAlways
[mpep-2273-5eaed6ba64ea888888904ef5]
Notice of Intent to Issue Ex Parte Reexamination Certificate
Note:
Indicates the status of claims after final rejection or second rejection with appeal.

If the patent owner does not timely file a notice of appeal and/or does not timely file the appropriate appeal fee, the patent owner will be notified that the appeal is dismissed. Form PTOL-468 may be used to provide the notification. The reexamination prosecution is then terminated, and a Notice of Intent to Issue Ex Parte Reexamination Certificate (NIRC) will subsequently be issued indicating the status of the claims at the time of final rejection (or after the second rejection of the claims, where an appeal was taken from that action without waiting for a final rejection). See MPEP § 2287.

Jump to MPEP SourceNotice of Intent to Issue Reexamination Certificate (NIRC)Reexamination CertificateAppeals in Reexamination

Citations

Primary topicCitation
Appeals in Reexamination
Ex Parte Reexamination
35 U.S.C. § 134
Appeals in Reexamination
Ex Parte Reexamination
Notice of Appeal Filing
35 U.S.C. § 257
Appeals in Reexamination37 CFR § 1.136
Appeals in Reexamination37 CFR § 1.136(a)
Notice of Appeal Filing37 CFR § 41.20(b)(1)
Final Office Action
Interviews in Reexamination
Notice of Appeal Filing
37 CFR § 41.31
Notice of Appeal Filing37 CFR § 41.31(a)(2)
Notice of Appeal Filing37 CFR § 41.31(b)
Final Office Action
Interviews in Reexamination
Notice of Appeal Filing
37 CFR § 41.54
Appeals in ReexaminationMPEP § 1204
Ex Parte Reexamination
Notice of Appeal Filing
Notice of Intent to Issue Reexamination Certificate (NIRC)
MPEP § 2287
Appeals in ReexaminationGreenwood v. Seiko Instruments, 8 USPQ2d 1455 (D.D.C. 1988)

Source Text from USPTO’s MPEP

This is an exact copy of the MPEP from the USPTO. It is here for your reference to see the section in context.

BlueIron Last Updated: 2025-12-31